Balanced friction adjuster



Oct. 12 1926.

' E. J. SIBLEY BALANCED FRICTION ADJUSTER Filed August 20 1925 Patented Get. 12, 1926.

EDWIN JOHN 'SIBLEY, OF WESTB'URY, YORK.

BALANCED rnrorron ADJUSTER.

Application filed August 20, 1925. Serial No. 51,314.

This invention relates to improvements in balanced friction window adjusters. The objectof the invention is to provide a friction adjuster adapted to control the swing or adjustment of hinged windows of the type in which the upper half of the window swings outwardly, while the lower half of the window swings inwardly.

In such cases itis desirable to provide a ia-lanced adjuster to control the opening of the two windows to maintain the same in whatever position of adjustment they may be placed.

The invention will be more fuly understood from the following specification read in connection with the accompanying drawing; in which Figure 1 is a sectional view of a window of the type set forth equipped with a balanced friction adjuster en'ibodyingr the in vention.

Figure 2 is a detailed sectional view of the one end of the adjuster.

Figure Sis a detail face view of parts of the adjuster with parts broken Figure 4 is a transverse sectional. detail view of parts of the adjuster with parts omitted.

Referring); to the drawing, the adjuster is arranged to be used in connection with a double hinge window comprising an upper window 1 hinged at 2 to swing outwardly, and a lower window 3 hinged at f to swing inwardly. Such windows are of particular advantage in factories, comfort rooms, bath rooms, kitchens or other places where a maximum of ventilation is required coupled with complete privacy, in that the windows are usually provided with frosted glass panes, and because of their position it is impossible to look directly into the room.

2 The window frames are provided with cooperating closing edges as at 5 and 6, and any suitable locking means may be used.

The adjuster for controlling the swing; of the windows and to hold them in balanced open relation comprises an arm 7 pivoted in its middle at 8 to a base plate 9 suitably secured to the frame 10 of the windows.

To each outer end of the arm 7 there is hinged a friction device which moves in and cooperates with a channel member 11 secured in a recess 12 in the frames of the windows.

The friction devices are duplicates of each other and the description of one suliices for both of them.

As seen more particularly in Figure .2 each friction device comprises a friction box which slides in the channel 11 with an easy sliding lit. 'The box has a bottom 18 and four sides 14, let. Within the box is placed a spring 15 which bears against a friction shoe 16 preferably of bronze or other suitable material. The shoe 16 fits within the four sides of the box and is pressed against the channel bottom to provide the required friction. .ii friction adjusting; screw 151 passes th ough the bottom the box aim bears ape .ist the spring 15.

he "cl is secured to the window I nitable screws In the box tom 12} there is'rigidly secured a pivot lug 1.9 which extends outwards from the box at rightangles thereto and parallel to the channel 11'. The lug is secured by riveting as at 20 and the rivet head forms a stop for "he one end of the spring 15 to maintain the latter in position'under the screw 17. The two pivot lugs 19, 19 are pivoted to the ends of the adjuster arm 7 by suitable pivots 21.

hen the windows are closed, the edges 5 and 6 meet on the dotted line shown at 22, and the frames are cut out as at 23, 23 to fit over the arm 7 as will be understood. The adjuster then assumes the position shown in dotted lines, where it will be noted that the arm is not parallel to the planes of the closed windows, but at an angle thereto to prevent dead centering.

When the windows are opened they will assume any position in parallelism and will be held in such position by the friction device as is obvious. The extreme open positions of the windows are reached when the friction shoes have been moved to abut the ends 2 1, 2 1 of the channel recesses 12, from whichit will be clear that the positioning of the channel members and the length of the arm 7 control the extent to which the windows may be opened.

The friction is easily adjusted by a screw driver applied to the screws 17.

In the present instance the invention has been disclosed for use in connection with two hinged windows of the same size in which case the friction to be adjusted at each end is substantially the same. It will be apparent, however, that the adjuster may be used in connection with windows of unequal size and weight in which case the adjustments will be correspondingly regulated to balance and hold the windows. The ease with which this may be done results from the simplicity of the construction disclosed.

Preferably, however, the adjuster will be balanced so that an equal amount of friction may be obtained on each window by a substantially similar adjustment of the friction at each end.

The adjuster is installed very easily and after once installed requires no further attcnt 1 except perhaps the adjustment of the friction from time to time to take up wear.

While I have disclosed my invention in its preferred form, nevertheless I do not wish to be limited thereto otherwise than as required by the legitimate and intended. sco e of the appended claims.

1 claim 1. The combination with two hinged windows mounted to swing in opposite directions from a given closed position, of a friction adjuster for controlling the sving of said windows comprising a relatively fixed friction member secured to each window, a relatively movable friction member mounted to cooperate with each of said relatively fixed members, an arm for pivotally connecting the said two relatively movable friction members and means for fixedly pivoting the said arm intermediate its ends.

2. lhe combination with two hinged windows mounted to swing in opposite directions from a given closed position, of a friction adjuster for controlling the swing of said windows comprising a relatively fixed friction member secured in a recess in each of said windows, a friction member mountd to slide in each of said relatively fixed riction members, means for adjusting the riction between each of the said slidable and the said relatively fixed friction memhers, pivot lugs projecting from said slidable friction members, an arm pivoted at its extreme ends to the said pivot lugs to opcratively connect the said two slidable friction members and means for fixedly pivoting said arm intermediate its ends in a given position between the said two windows.

EDlVIN JOHN SIBLEY. 

